Periods
| Period | Time range |
|---|---|
| Data extraction period | 2020-03-05 - 2022-05-20 |
| Enrollment period | 2021-01-01 - 2021-08-31 |
| Study period | 2021-01-01 - 2022-08-31 |
Study population and enrollment
Description of the study population: table 1
| Intervention group (N=8126) |
Control group (N=8126) |
P-value | |
|---|---|---|---|
ᵃ5-year age groups | |||
| sex_cd | |||
| Mean (SD) | 1.46 (0.537) | 1.45 (0.549) | 0.175 |
| Median [Min, Max] | 1.00 [0, 2.00] | 1.00 [0, 2.00] | |
| age_cdᵃ | |||
| Mean (SD) | 11.6 (2.96) | 11.6 (2.99) | 0.622 |
| Median [Min, Max] | 12.0 [2.00, 18.0] | 12.0 [2.00, 18.0] | |
| residence_area_cd | |||
| 731 | 1133 (13.9%) | 1170 (14.4%) | 0.00829 |
| 732 | 1144 (14.1%) | 1011 (12.4%) | |
| 733 | 5849 (72.0%) | 5945 (73.2%) | |
| institutionalized_bl | |||
| Yes | 225 (2.8%) | 219 (2.7%) | 0.81 |
| No | 7901 (97.2%) | 7907 (97.3%) | |
| foreign_bl | |||
| Yes | 1234 (15.2%) | 1231 (15.1%) | 0.965 |
| No | 6892 (84.8%) | 6895 (84.9%) | |
| pregnancy_bl | |||
| Yes | 97 (1.2%) | 83 (1.0%) | 0.33 |
| No | 8029 (98.8%) | 8043 (99.0%) | |
| essential_worker_bl | |||
| Yes | 226 (2.8%) | 224 (2.8%) | 0.962 |
| No | 7900 (97.2%) | 7902 (97.2%) | |
| comorbidities_bl | |||
| Yes | 3736 (46.0%) | 3723 (45.8%) | 0.85 |
| No | 4390 (54.0%) | 4403 (54.2%) | |
| immunestatus_bl | |||
| Yes | 2280 (28.1%) | 2287 (28.1%) | 0.917 |
| No | 5846 (71.9%) | 5839 (71.9%) | |
Tables
The individuals in the imported dataset are counted by ‘fully_vaccinated_bl’ and ‘confirmed_case_bl’.
| Not completed a primary vaccination schedule | Completed a primary vaccination schedule | Total | |
|---|---|---|---|
| No confirmed case | 639 | 6010 | 6649 |
| Confirmed case | 361 | 2990 | 3351 |
| Total | 1000 | 9000 | 10000 |
Ratio = \(\frac{(\frac{confirmed \ cases}{non-vaccinated \ individuals})} {(\frac{confirmed \ cases}{vaccinated \ individuals})}\) = 0.9202832
The individuals eligible for analysis are counted by ‘fully_vaccinated_bl’ and ‘confirmed_case_bl’.
| Not completed a primary vaccination schedule | Completed a primary vaccination schedule | Total | |
|---|---|---|---|
| No confirmed case | 620 | 5739 | 6359 |
| Confirmed case | 329 | 2639 | 2968 |
| Total | 949 | 8378 | 9327 |
Ratio = \(\frac{(\frac{confirmed \ cases}{non-vaccinated \ individuals})} {(\frac{confirmed \ cases}{vaccinated \ individuals})}\) = 0.9085929
The matched individuals are counted by ‘fully_vaccinated_bl’ and ‘confirmed_case_bl’.
| Not completed a primary vaccination schedule | Completed a primary vaccination schedule | Total | |
|---|---|---|---|
| No confirmed case | 558 | 5705 | 6263 |
| Confirmed case | 237 | 2613 | 2850 |
| Total | 795 | 8318 | 9113 |
Ratio = \(\frac{(\frac{confirmed \ cases}{non-vaccinated \ individuals})} {(\frac{confirmed \ cases}{vaccinated \ individuals})}\) = 1.0537541
Survival in un-matched population
| Variable | Beta (SE) | HR (95% CI) | P |
|---|---|---|---|
| fully_vaccinated_blTRUE | -0.02 (0.07) | 0.98 (0.86, 1.11) | 0.71 |
| Strata | Time | Number at risk | Number of events | Number censored | Survival | Std. error | Cumulative hazard | Std. error cumulative hazard |
|---|---|---|---|---|---|---|---|---|
|
|
0 | 902 | 1 | 0 | 0.9988914 | 0.0011080327 | 0.0011086475 | 0.0011086475 |
|
|
100 | 887 | 14 | 0 | 0.9833703 | 0.0042579213 | 0.0167601671 | 0.0043275070 |
|
|
200 | 881 | 6 | 0 | 0.9767184 | 0.0050209720 | 0.0235436859 | 0.0051377719 |
|
|
300 | 869 | 12 | 0 | 0.9634146 | 0.0062511087 | 0.0372477521 | 0.0064843714 |
|
|
400 | 693 | 179 | 0 | 0.7649667 | 0.0141183086 | 0.2674750096 | 0.0184246060 |
|
|
500 | 621 | 69 | 0 | 0.6884701 | 0.0154201697 | 0.3726241520 | 0.0223575550 |
|
|
600 | 620 | 1 | 0 | 0.6873614 | 0.0154351407 | 0.3742344580 | 0.0224154712 |
|
|
0 | 8378 | 1 | 0 | 0.9998806 | 0.0001193531 | 0.0001193602 | 0.0001193602 |
|
|
100 | 8253 | 125 | 0 | 0.9849606 | 0.0013297021 | 0.0151514274 | 0.0013498093 |
|
|
200 | 3885 | 468 | 3997 | 0.9149921 | 0.0034433135 | 0.0887960657 | 0.0037611165 |
|
|
300 | 2645 | 478 | 668 | 0.7759389 | 0.0065510625 | 0.2534754869 | 0.0084351389 |
|
|
400 | 2307 | 123 | 220 | 0.7394797 | 0.0070201758 | 0.3015773379 | 0.0094855960 |
|
|
500 | 786 | 5 | 1561 | 0.7378440 | 0.0070426699 | 0.3037910797 | 0.0095371385 |
|
|
600 | 7 | 0 | 725 | 0.7378440 | 0.0070426699 | 0.3037910797 | 0.0095371385 |
| Variable | Beta (SE) | HR (95% CI) | P |
|---|---|---|---|
| fully_vaccinated_blTRUE | -0.02 (0.07) | 0.98 (0.86, 1.11) | 0.73 |
| age_cd | 0.00 (0.01) | 1.00 (0.99, 1.02) | 0.64 |
| sex_cd | -0.05 (0.05) | 0.95 (0.86, 1.04) | 0.26 |
| residence_area_cd | |||
| 731 (ref) | – | – | – |
| 732 | 0.04 (0.10) | 1.04 (0.85, 1.28) | 0.67 |
| 733 | 0.14 (0.08) | 1.15 (0.99, 1.34) | 0.07 |
| essential_worker_blTRUE | 0.03 (0.15) | 1.03 (0.76, 1.39) | 0.84 |
| institutionalized_blTRUE | 0.20 (0.14) | 1.22 (0.92, 1.61) | 0.17 |
| foreign_blTRUE | -0.04 (0.07) | 0.96 (0.83, 1.11) | 0.60 |
| comorbidities_blTRUE | 0.02 (0.05) | 1.02 (0.92, 1.13) | 0.75 |
| immunestatus_blTRUE | 0.01 (0.06) | 1.01 (0.90, 1.13) | 0.93 |